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Join Date: May 2006
Location: SLC, UT
Posts: 391
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Electrical Component - What Is This?
I've searched and look over the forums, parts catalogs and shop manual, but have not yet found a good component diagram.
1. What is the silver box in this picture?  2. Does anybody have some diagrams, or know where to find? Thanks! Mine is a '78SC if it matters.
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John 1982 911SC Targa ~ Gulf Blue (gone but not forgotten) |
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08-07-2007, 04:07 PM
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Model Citizen
Join Date: May 2007
Location: The Voodoo Lounge
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A similar looking device on my 88, but found under the dash, is the cruise control regulator.
I'm sure smarter people than I will soon give you the answer. mo
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"I would be a tone-deaf heathen if I didn't call the engine astounding. If it had been invented solely to make noise, there would be shrines to it in Rome" |
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08-07-2007, 04:19 PM
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Cigars and 911's -- Smile
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Looks more like a control component for aftermarket radio or changer. but I would trust input from others.
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[GruppeB # 978] 1978 911 SC ROW (Pure Euro, no DOT or EPA work done..) 1991 Toyota MR2 Turbo (3S-GTE 4Banger Rocket) 2001 Audi - A6 Quattro 4.2L-V8 (love the growl) 2014 Honda Odyssey for the soccer-team/accessories |
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08-07-2007, 05:57 PM
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19 years and 17k posts...
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It looks like the aftermarket Hofco burglar alarm that was installed in my '74.
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Art Zasadny 1974 Porsche 911 Targa "Helga" (Sold, back home in Germany) Learning the bass guitar Driving Ford company cars now... www.ford.com |
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08-07-2007, 06:22 PM
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Quote:
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John 1982 911SC Targa ~ Gulf Blue (gone but not forgotten) |
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08-07-2007, 06:55 PM
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Are the three black cables lying on top of the box, connected to the box? If so, it looks like they are not connected to anything. Can you remove the box and see if there is a label on the underside?
Dave
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Make sure to check out my balls in the Pelican Parts Catalog! 917 inspired shift knobs. '84 Targa - Arena Red - AX #104 '07 Toyota Camry Hybrid - Yes, I'm that guy... '01 Toyota Corolla - Urban Camouflage - SOLD |
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08-07-2007, 07:16 PM
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Join Date: Apr 2002
Posts: 30,533
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Out of curiosity, what is that "filter thingy" with the hose in the lower left of your pic?
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08-08-2007, 04:48 AM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
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Round thing on the lower left is the air horn pump.
Bet that the thing you are looking at on the upper right is an alarm.
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2021 Subaru Legacy, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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08-08-2007, 04:59 AM
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Looks like a motion sensor for a pretty old style alarm system.
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Kerry Plackmeyer 1975 911s |
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08-08-2007, 05:02 AM
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Alter Ego Racing
Join Date: May 2002
Location: Florida
Posts: 5,553
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My standard answer is "the flux capacitor" but perhaps an early version.....
Looks like an alarm module.
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International GT Champion; Porsche GT3 Cup Trophy Champion; Klub Sport Challenge Champion; Rolex Vintage Endurance Series Champion; PCA Club Racing Champion; National Vintage Racing Champion |
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08-08-2007, 05:27 AM
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Quote:
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08-08-2007, 06:13 AM
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Location: Costa Mesa
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Neither a Hofco alarm nor motion sensor. I installed Hofco for 20 years and the control boxes were black, blue, or green plastic. Never saw or located a motion sensor that large or in that location. My guess is that it is an old 3 watt cell phone brain. You can tell by the inputs (antenna connector, power cord, multi pin connection for the handset). Alarm systems are mostly RF controlled and the metal case would defeat most remote control RF. 1978 was still the era of keypad alarms that did not use RF so it might be a very old alarm. Either way, not factory PORSCHE.
Regards, Charles
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Charles 1970 911t 1962 356 S90 1964 Safari Rally Comet Editor www.Bench-Racing.com |
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08-08-2007, 06:13 AM
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Model Citizen
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Quote:
Sorry for jacking the thread.
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"I would be a tone-deaf heathen if I didn't call the engine astounding. If it had been invented solely to make noise, there would be shrines to it in Rome" |
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08-08-2007, 07:42 AM
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19 years and 17k posts...
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Yep!
Quote:
Yep, my Hofco was black plastic. It caused me a multitude of problems because I paid to have it removed when I bought the car and believed that it was removed only to find out last year that it was still active in the ignition and fuel pump circuits, causing an intermittent "no start" condition.
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Art Zasadny 1974 Porsche 911 Targa "Helga" (Sold, back home in Germany) Learning the bass guitar Driving Ford company cars now... www.ford.com |
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08-08-2007, 07:54 AM
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Join Date: Apr 2002
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Quote:
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08-08-2007, 08:11 AM
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1978 Porsche 911SC 3.0
MazdaSpeed3
1984 Porsche Targa 3.2L
